Route notes
Why this routing works
This multi-stop itinerary is structured as a two-city outbound sequence from San Diego to Singapore, then onward to Lisbon, before returning to San Diego. With 13 nights in Singapore followed by 61 nights in Lisbon, the routing separates a shorter first stop from a substantially longer second stay, which can make the timing straightforward to map across an 11-week trip.
Because this is built as a single multi-stop economy ticket rather than separate one-way flights, the route keeps the long-haul sequence fixed in advance: North America to Southeast Asia, then Europe, then back to North America. That structure can simplify planning when the stop order is already decided and the trip has a clear return point.
The April departure places the trip across the apr-jun travel window, so the itinerary runs over a defined spring-to-early-summer period. From a logistics standpoint, this kind of timing works well for travelers who want a preset long-stay routing with only two extended stops rather than a higher number of shorter connections.